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Get Full Access to Engineering Mechanics: Statics - 14 Edition - Chapter 6 - Problem 6-86
Get Full Access to Engineering Mechanics: Statics - 14 Edition - Chapter 6 - Problem 6-86

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# Solved: The pumping unit is used to recover oil. When the

ISBN: 9780133918922 126

## Solution for problem 6-86 Chapter 6

Engineering Mechanics: Statics | 14th Edition

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Problem 6-86

The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting in the wireline at the well head is 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse-head C weighs 60 lb and has a center of gravity at GC. The walking beam ABC has a weight of 130 lb and a center of gravity at GB, and the counterweight has a weight of 200 lb and a center of gravity at GW. The pitman, AD, is pin connected at its ends and has negligible weight. GB 20 250 lb 70 5 ft 3 ft 2.5 ft 6 ft 1 ft Gw GC D A B E C M Prob. 686

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